Overlap time and voltage drop compensation in an AC/AC converter
Overlap time and voltage drop compensation in an AC/AC converter
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AC/AC 转换器中的重叠时间和压降补偿
DOI：
10.1109/ias.2003.1257504
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
N. Hugo
中科院分区：
文献类型：
--
作者：
A. Akdag;P. Stefanutti;L. Meysenc;N. Hugo
本文提出了一种采用交-交直接变流器和带有中频隔离变压器的逆变器的交-直变流系统。AC/AC变流器的工作原理是基于软整流技术。为保证AC/AC转换器的正常零电流开关工作，引入了重叠时间。在运行过程中，流经中频变压器的电流会因铜损而导致电压下降。这两种现象导致交/交交交变频器的实际运行出现偏差。本文通过推导非理想工况下的相关公式，提出了一种补偿技术。有了这样的补偿，整个系统将对不断变化的条件做出更快的动态反应，并将稳态运行中的误差降至最小。仿真结果验证了该补偿方案的可行性，具有较好的性能和较快的动态响应速度。
This paper presents an AC/DC converter system utilizing an AC/AC direct converter and an inverter with a medium frequency isolating transformer. The operation of the AC/AC converter is based on soft commutation technique. Overlap time has been introduced for a proper zero current switching operation of the AC/AC converter. During operation, the current through the medium frequency transformer causes a voltage drop due to copper losses. These two phenomena result in deviations from the actual operation of the AC/AC cycloconverter. In this paper, a compensation technique is proposed by deriving the related formulas for nonideal operating conditions. With such compensation, the overall system will react dynamically to the changing conditions faster and the error in steady state operation is minimized. The simulation results verify the feasibility of the proposed compensation scheme for a better performance and faster dynamics.